Sewing-machine



(Model.) 4 Sheets-Sheet 1. P. BEAN.

SEWING MACHINE.

No. 309,516. Patented Dec. 23, 1884.

WITNEEEEE INVENTEIR Z3? 07M aw (ModeL) 4 Sheets-Sheet 2.

P. BEAN.

SEWING MAGHINE.

No. 809,516. Patente dDec. 23, 1884.

HHHHIIM III WITNESSES INVENTUH gw/gw 4 Sheets-Sheet 3.

(ModeL) F. BEAN.

SEWING MACHINE.

No. 309,516. Patented Dec. 23, 1884.

O O A 2 I I m7 5 e I T @l T I J i Z T l i i i p 5 Fig WITNELEEEE 'INVENTUR Fig (ModeL) V 4 Sheets-Sheet 4.

F. BEAN.

SEWING MAGHINE. No. 309.516. Patented Dec. 23, 1884 llllllllllllllllll' \MTNEEEES INVENTEIR machines in which the stitch is formed by a UNiTFD Snares arnn'r @rrrcra FRANK BEAN, or nbronn, MASSACHUSETTS.

SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 309,516, dated December 23,1884. Application filed Xovember 19, 1963. (ModeL) To all whom it may concern:

Be it known that I, FRANK BEAN, a citizen of the United States, residing at Medford, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Sewing Machines, of which the following is a specification.

My invention relates to that class of sewing single thread drawn through the work by a hook; and it has for its objects so constructing the machine that the position of the press er-foot as it varies with the thickness of the work regulates the length of motion of the thread-drawing hook, and that the operator may change the length of stitch while the machine is in motion by means of a foot-lever. 1 I attain these objects by the mechanism illustrated in the accompanying drawings, in which i Figure 1 is a front elevation of my machine. Fig. 2 is a sectional view on line 1 y of Fig. 1, showing the feedadjusting device. Fig. 3 is a side elevation. Fig. 4 is a horizontal sec tion on line a" m, Fig. 3. Fig. 5 is an elevation of parts that show immediately behind the line :1 .2, Fig. Fig. 6 is an elevation showing parts that relate immediately to the device for transmitting motion from acam-groove to the presser-foot, being a modification of the device shown in Fig.8. Fig. 7 is a detail. Fig. 8 is an elevation showing parts immediately behind the line 'v e of Fig. 3. Fig. 9 is ahorizontal section on line 10 w, Fig. 8. Fig. 10 is aperspective view of ashoe to illustrate the difference of thelength of stitch in the shank and ball, also to show the varying I thickness of the sole.

My machine,'in its general operation. and method of sewing, is the same as the ordinary singlc-waX-thread machine, and most of the parts are constructed substantially as in the ordinary manner. Therefore I do not consider it necessary to fully describe all of its parts and their operations.

Let B, Fig. 1, represent the awl; B, awl-ca-rrier; B, an arm on the shaft B for actuating the awl-carrier, said shaft B being operated by the arm 13*, face-earn B and cam-pin B.

(See Fig. 3.) D, Fig. 1, is the thread-carrier,

which is operated by the rack and pinion D D Fig. 4.

0, Fig. 1, is the presser-foot and its rod, made in the usual manner. This presser-foot is actuated by the cam-disk 0 Figs. 3 and 8. The cam-groove C acting on the canrpin G causes the lever O to swing on its fixed pivot 0", Fig. 8. This motion of the lever O is com municated through a toggleclamp, e to a swinging block, a", thence to the fiatted rod 6, thence through the arm 0 to the rocker-shaft 0 Fig. 8. From the rocker-shaft G Fig. 8, motion is communicated to the presser-foot O by means of a slotted arm, 0, and a pin, 12. See Fig. 1.)

By the devices shown in Figs. 6 and 8 I am enabled to cause the presser-foot C to rise a fixed distance above the stock being worked, irrespective of its thickness. For instance, the distance the presser-ioot shall rise and fall is determined by the shape of the cam, Figs. 6 and 8-say one-fourth of an inch-the operating-lever G passing through that distance at every revolution of the cam G and as the rod 0, Fig. 8, is not held by the clamping-toggle 6 except when the lever O is rising, it may be seen that the rod 6 may be moved irrespective of the lever Thus, ifthick stock is placed under the presser-foot, the presserfoot will rest at a distance above the needle plate of the machine equal to the thickness of the stock, and acting through the arm 0, rocker-shaft C and arm 0*, Fig. 8, will hold the rod 0 up, so that the rod. 0 occupies a po sition when at rest exactly corresponding with the position of the pressenfoot-that is, in a position elevated or depressed correspond ing to the thickness of the stock. Now, if we examine the clamping device at c, Fig. 8, we shall see that in the upward movement of the lever 0" the rod 0 is taken from its position, already determined by the thickness of the stock, and raised to a position above it equal to the full throw of the canrgroove C The object of giving the presser-foot a uni form movement above the stock is to obtain a motion regulated by the thickness of the stock that may be transmitted to the hook it, so that the vertical movement of the hook shall be My device for regulating the motion of the hook h by the presser-foot 0 consists of an arm, F, attached to the rockershaft' 0 link F, link F, provided wit-h a pin, F, which slides in a slot made in the lever F", Figs. 1 and 5, the lever F being operated by the camgroove F, which acts upon the pin F The motion given to the slotted lever F, Fig. 5, is adetermined motion about the center F; but the motion it transmits to the link F" is a variable motion, it being greater when the pin Fis moved upward in the direction of the arrow T and less when it is moved in the opposite direction, and as the position of the pin F is governed by the presser-foot mechanism it is evident that the variation in motion of the link F is governed by the position of the presser-foot Ot-hat is, if the presser foot is raised by the stock it will cause the rockershaft 0 to revolve in the direction of the arrow T, and thus cause the arm F, acting through the link F, to draw the pin F" up the slot in the direction of the arrow T, thus increasing the motion of the link F The motion of the link F is transmitted to the hook h by the arm II, rocker-shaft H, Fig. 5, arm H pin H", and sliding bar II", Fig. 1. In Fig. 6 I have shown a modification of the device shown in Fig. 8 for regulating the motion of the presser-foot. In this case the arm 0 has, instead of the rod 0, a mortised link-piece, O, which serves to connect it with thelever 0". Immediately above the end of the lever 0", that enters the mortise in the lever C", I place a wedge, E, said wedge being connected by a shank-piece. E, to an arm, E, which projects from the rockershaft 0 This wedge E presents a thick or thin part between the end of the lever C and a friction-block, E, Fig. 7 placedin the mortise of the link 0, in accordance with the position of the arm E and rockershaft G which position is determined, as has already been explained, by the thickness of the work under the presser-l'oot.

It being desirable to use stitches of clit'ierent lengths in sewing shoes, I have invented the following device for the purpose of enabling the operator to change the length of stitch by simply depressing the foot-lever L", Fig. 1. This can be done without stopping the machine or interfering with its work.

K, Fig. 2, is a rocker-shaft operated by an ordinary cam motion, and has upon its end a slotted arm, K", the slot being represented by K.

K Figs. 1, 2, and 3, is a horizontally-sliding housing which holds the reciprocating bar II of the hook h. This housing K slides horizontallyin dovetail grooves. (Represented at 7; k, Fig. 2.)

' K K represent a bolt or stud attached to I the sliding housing K in such a manner that i it may slide vertically in the said housing,the part L, Fig. 2, being rigidly attached to the stud K", but free to slide vertically in the housing.

L is a projection on the piece L,and serves to connect the piece L by means of the rod If to the foot-lever L", The inner end,K", of the stud Klrests in the slot K" of the swinging arm K.

It It, Fig. 2, are adj Listing-screws which limit the vertical motion of the stud K". As the length of the stitch depends upon the throw of the stud K it is evident it will be longer when the stud K is drawn down toward the lower end of the arm IQ, and shorter when it is allowed to rest in a higher position. S, Fig. l, is a spring which throws the piece L and the stud K upward when it is not forced downward by the lever L. In working this machine the ordinary length of stitch is determined by the upper adjusting-screw, R; but when the operator wishes to lengthen the stitch he places his foot upon the lever L and draws the stud K down.

In Fig. 10 I have shown a shoe sole side up, for the purpose of showing the length of the stitches, but in sewing the shoe its position is 5' reversed-that is, the sole side is down and the welt upward.

I claim as my invention 1. In a sewing-machine, the combination of the resser-foot bar 0 and its operating mech- 10o anism,consisting of the arm 0, rock-shaft C, arm 0, and rod 0, with the cam mechanism for operating the same, consisting of the cam C cam-groove G lever C and clamping ,IIIGCIIELHISIII c 6-, operating together substantially as described, and for the purpose set forth.

2. In a sewing'machine, the combination of the rock-shaft G", the arm F, link F, and the slotted lever F, with the cam-pin F cam F cam-groove F, link F having pin F", arm H, rock-shaft H, arm H", rod H, hook h, and complementary means, as described, for completing a stitch, all working together substantially as described, and for the purpose set I 15 forth.

FRANK BEAN.

\Vitnesses:

FRANK G. PARKER, CHAS. SPAULDING. 

